package com.zhang.server;

import io.netty.bootstrap.ServerBootstrap;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelOption;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.nio.NioServerSocketChannel;

public class NettyServer {



    public static void main(String[] args) {

        new NettyServer().bing(7397);

    }



    private void bing(int port) {

        //配置服务端NIO线程组

        EventLoopGroup parentGroup = new NioEventLoopGroup(); //NioEventLoopGroup extends MultithreadEventLoopGroup Math.max(1, SystemPropertyUtil.getInt("io.netty.eventLoopThreads", NettyRuntime.availableProcessors() * 2));

        EventLoopGroup childGroup = new NioEventLoopGroup();

        try {

            ServerBootstrap b = new ServerBootstrap();

            b.group(parentGroup, childGroup)

                    .channel(NioServerSocketChannel.class)    //非阻塞模式

                    .option(ChannelOption.SO_BACKLOG, 128)

                    .childHandler(new MyChannelInitializer());

            ChannelFuture f = b.bind(port).sync();

            System.out.println("itstack-demo-netty server start done");

            f.channel().closeFuture().sync();

        } catch (InterruptedException e) {

            e.printStackTrace();

        } finally {

            childGroup.shutdownGracefully();

            parentGroup.shutdownGracefully();

        }

    }



}